Sometimes it works. One study found that kids who drank with their parents were half as likely to be regular drinkers. But those who drank at parties where parents supplied alcohol were twice as likely to become regular drinkers.

Teens are prone to risky behavior and their brains are still developing. So don't be afraid to set limits and talk with your kids. Being "under the influence" can be a good thing... if the influence is yours. And parents have a lot more of it then they may think.